About the “0x0000007F” error

The following information on this error has been compiled by NeoSmart Technologies, based on the information gathered and reported by our global network of engineers, developers, and technicians or partner organizations.

Description and Symptoms

The error messages, alerts, warnings, and symptoms below are tied to this error.

Symptom 1: 0x0000007F error screen

The error is usually triggered by two situations that occur in the kernel mode: either the CPU generated a condition that the kernel is not allowed to catch or the condition is an unrecoverable error.

The most common cause is hardware failure, mostly due to faulty or mismatched memory. There can be cases when faulty software currently installed on your computer can also make this error appear.

A problem has been detect and Windows has been shut down to prevent damage
to your computer.
If this is the first time you’ve seen this Stop error screen,
restart your computer. If this screen appears again, follow these steps:
Check to be sure you have adequate disk space. If a driver is
identified in the Stop message, disable the driver or check
with the manufacturer for driver updates. Try changing video
adapters.
Check with your hardware vendor for any BIOS updates. Disable
BIOS memory options such as caching or shadowing. If you need
to use Safe Mode to remove or disable components, restart your
computer, press F8 to select Advanced Startup options, and then
select Safe Mode.
Technical information:
*** STOP: 0x0000007F (0x0000000000, 0x0000000000)

On computers with Windows 8 the error code is replaced with UNEXPECTED _KERNEL_MODE_TRAP:

:(
Your PC ran into a problem and needs to restart. We’re just
collecting some error info, and then we’ll restart for you. (0%
complete)
If you’d like to know more, you can search online later for this error: UNEXPECTED KERNEL MODE TRAP

Causes of this Error

This error has been known to occur as a result of one or more of the following:

Cause 1: Faulty RAM module

The most common cause of this error is a faulty RAM module that periodically gives read/write errors. If that’s the case, then it is advisable to scan the system memory and replace the faulty RAM module.

Cause 2: Corrupt or outdated device drivers

Sometimes the device drivers may become misconfigured, corrupt or outdated. That may also happen after a Windows update or a Windows downgrade from a newer system to an older one.

Fixing “0x0000007F” on Windows

Fix #1: Check new hardware

If the error occurs after a recent hardware installation, it’s most likely that the error is caused by that specific hardware piece.

In order to fix the error, simply remove the new hardware and restart your computer.

If the error was caused after you’ve installed the driver of the new hardware, go to Fix #3.

Fix #2: Test RAM memory

The error can be triggered by faulty or mismatched memory.

If 0x0000007F occurs immediately after you’ve plugged-in a new RAM memory, shut down your computer, remove it and then restart your computer and check if the error was fixed.

If the error is caused by a faulty RAM memory, check your RAM using the Windows Memory Diagnostic Tool.

To do so, follow these steps:

Click Start

Type in Memory Diagnostics Tool in the search box

Right-click on Memory Diagnostics Tool

Choose Run as Administrator

Follow the instructions to begin the diagnostic process

Windows memory diagnostics screen

If Windows Memory Diagnostic isn’t returning any results, you can also use Easy Recovery Essentials’ Automated Repair feature that can check your RAM, HDD and CPU in a single process: